If you’re short sighted (over -2.00 prescription), consider Trivex – a light but tough material – or high-index 1.6 lenses. For a prescription over +3.00, consider a 1.67 high-index (thinner) lens, and for over +5.00, choose a 1.74 lens. If you’re long sighted (over +2.00 prescription), consider a lens made 'minimum edge surfaced' (thinned). High index just means that the lens is thinner. If you're looking for slim lenses, you're likely to encounter the term 'high index'. Understand lens materials and thicknesses There's no visible line in the lens, as there is in bifocal lenses. Varifocal lenses combine far-distance, intermediate, and close-up vision, if you don’t want multiple pairs. Reading glasses tailor single-vision glasses to your reading distance.Įnhanced reading glasses work at two reading distances – eg your book (close up) and computer (further away). Single-vision lenses have one prescription throughout the lens. We also reveal the best- and worst-rated opticians brands. Use our expert optician’s advice and five-step guide below to choose a pair of glasses that are the best price and fit for your eyes. I know this won’t help for these big glasses you were given but I hope this helps your future purchases.Our research shows that shoppers sometimes struggle to understand whether different glasses choices – such as lens coatings – are right for them, when buying a new pair of glasses. If it strays by 10-12 mm or more then it’s getting way too big for you. Try to find a frame with a PD as close as possible to your actual PD. Now what is your actual PD? Have you gotten it measured, because you sound like you are making it up. Do you have the frame measurements like I mentioned? You can find out what the frame PD is. In your case, if the frame’s “minimum PD” is 61 then the actual frame PD is probably much larger than that, making 61 the end of the line for how far the lens can be scooted. My actual PD is 29.5/29.5 (59), that’s 7 mm different from the frame PD, so each lens has to be scooted over 3.5 mm for me to see. This is important because we have to scoot the center of the lens puck to meet where the eye sits for you to see properly. This means the eye will be well centered in the lens. The best fitting glasses have the person’s PD be very close to the frame PD. My glasses measurements are 48/18/142: my frame PD is 66. This can be found by adding the first two numbers of the frame measurements. Your PD is your PD, it is what it is.įrames have a “PD” too, which is the width of one lens plus the width of the distance between the lenses in mm. It can be written as one number which is eye to eye, or two numbers which is right eye to the center of the nose bridge then left eye to the center of the nose bridge. PD stands for pupillary distance: the distance between the centers of your pupils in mm. I really can’t speak for what they are providing or what their standards or ranges are, but I will try to clarify this PD stuff a little more for you. And for the ones that are a minimum of 61 single PD, they still charge extra because the true minimum is still wider than that. For some, they adjust to my dual PD from a different PD designation they make the frames at, for an additional fee. It was the case for a bunch of frames I got and am going to get. This is zenni, where they have a huge variety and apparently some frames simply only come with a single PD with a minimum of 61. But going forward, if a frame demands single PD and has a minimum of 61, what should I be putting for the single PD? To be completely honest they were purchased by an older gentleman friend who just buys me shit when I ask for it, and it's not a big deal if they don't work out. I also just went back and forth with this woman over email all day and gave her a final confirmation and again, these were just a gift. Really? Wait, so it should be a higher single PD? I just went for the lowest ones the frames would accommodate.
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